Boiler-tube cleaner.



No. 706,200. Patented Aug. 5, I902.

G. C. HUASEBARTH.

BOILER TUBE CLEANER.

(Application filed Min. 24, 1902.)

(No Model.)

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Urrnn States Patent rtrc GUSTAV C. QUASEBARTH, OF ST. LOUIS, MISSOURI,ASSIGNOR OF ONE-HALF TONATHAN I-IOLBERT, OF ST. LOUIS, MISSOURI.

BOILER TUBE CLEANER.

SPECIFICATION forming part of Letters Patent No. 706,200, dated August5, 1902.

Application filed March 24, 1902. Serial No. 99,764. (No model.)

To ctZZ whom, it may concern:

Be it known that I, GUSTAV C. QUAsE- EARTH, a citizen of the UnitedStates, and a resident of St. Louis, Missouri,-have invented certain newand useful Improvements in Boiler-Tube Cleaners, of which the followingis a specification.

My object is to construct a boiler tube cleaner; and my inventionconsists of a pis- IO ton-casing adapted to slide back and forth in theboiler tubes and having a transverse bore forming a hammer-pistonchamber, the ends of said chamber being enlarged to form die-holderseats; a hammer-piston slidingly I 5 mounted in said chamber, saidpiston having valve-releasing-port-connecting grooves in its periphery;die-holders slidingly mounted in said die-holder seats; dies carried bysaid die-holders; a valve-casing attached to the 2'0 piston-casing andhaving a transverse bore parallel with the piston-chamber and forming avalve-chamber; a valve slidingly mounted in said valve-chamber andhaving pressure-port-connectin g grooves in its periphery,

2 5 and having an eXhaust-port-connecting groove in its periphery, andhaving valve-shifting ports connecting the pressure to each end of thevalve; plugs closing the. ends of said valve-chamber and a steam-supplypipe con- 3o nected to said valve-casing, there being pressure-portsleading from the supply-pipe to the valve chamber and there beingpressureports leading from the,valve-chamber to the piston-chamber, sothat the reciprocation of 3 5 the valve admits pressure first to one endof the valve-and then to the other, and there being an exhanst-port, sothat the reciprocation of the valve will release the exhaust from oneend of the valve while the pressure is being admitted to the other end,and there being valve-releasing ports leading from said valve-chamber tothe piston-chamber, and there being second valve-releasing ports leadingfrom the piston-chamber, so that the re ciprocation of the piston willconnect said first and second valve-releasing ports to re lease thepressure first from one end of the valve and then from the other end, asrequired to reciprocate the valve.

Figure 1 is an elevation of the outer end of a boiler-tube cleanerembodying the principles of my invention. Fig. 2 is a side elevation asseen looking in the direction indicated by the arrows in Figs. 1 and3.Fig. 3

is a central section on the lines 3 3 of Figs. 1 and 2. Figs. 4 and 5are plans of the meeting faces of the piston-casing and valve-casing,Fig. 4 showing the piston-casin g and Fig.

5 showing-the valve-casing.

Referring tothe drawings in'detail, the piston-casing 6 is substantiallycircular in end elevation,'as shown in Fig. 1, and is adapted to slideback and forth in the boiler-tubes, the largest diameter of the casingbeing slightly less than the'inside diameter of the boiler-tube. Thetransverse bore 7 is formed through the casing, and the bushing 8 isinserted-into said bore, the enlarged openings at the ends of-thebushingforming the diecarrier seats 9'and 10, in which the die-hold- 7oers 11 and-12 operate, andthe space between thedie -carriers,and throughthe bushing forming the piston-chamber 13,in WlllOhlihG hammer-pistonoperates,"said piston having the valve releasin'g port-connectinggrooves 7 5 15'and 16 inits periphery. Key-'slotslf are formed in thedie-holders, and set-screws 18 are inserted throu gh' the casing in'tosaidslots to hold the :die holders from being blown out of theirseats.Springs 19 maybeinserted between the ends of the bushing'and thedieholders to yieldingly press the'dies against the inner face of theboiler-tube; but the springs are not essential, becausethe'exhaustpressure will-accomplish the same purpose. The dies 20 haveperipheral grooves 21 and heads 22, and the dies are driven-into thedie-holders from theinside,and then the metal of the die-holders isriveted or hammered into the grooves 21 to hold the dies from rattlingor backing out, while the heads 22hold the dies from being driventhrough the holders. The dies are hard and the holders are soft.

The valve-casing '23 has a transverse bore parallelwith thepiston-chamber and forming the valve-chamber 2 1, in which the valve 25is slidingly mounted, said valve having the pressure-port-connectinggrooves 27 and 28 in its periphery and said valve also having theeXhaust-port-connecting groove 29 in its periphery and also having thevalveshifting ports 30 and 31, connecting the grooves 27 and 28 to theends of the valve. The plugs 32 and 33 close the ends of thevalve-chamber, and a steam-supply pipe 34 is tapped into thevalve-casing, and there being pressure-ports 35 and 36 leading from thesteam-pipe to the valve-casing at points I to connect with the grooves27 and 528. The

. open air at a point to be in connection with the groove 29, so that asthe valve reciprocates the exhaust is released first from one end of thepiston and then from the other end, the pressure being admitted to theopposite end from that which is exhausting. The valve-releasing ports 42and 43 lead from the ends of the valve' chamber through thevalve-casing, then along the face of the piston-casing, then through thepiston casing to the piston-chamber to communicate alternately with thegrooves 15 and 16 in the hammer-piston, and the second valve-releasingports 44 and 45 lead from the pistonchamber to the open air, so thatsaid ports 42 and 43 are connected to the ports 44 and 45 by the grooves15 and 16 as the piston reciprocates, thereby releasing the pressurefrom first one end and then the other end of the valve and reciprocatingthe valve.

In the practical operation the dies are held against the inner face ofthe boiler-tube and the hammer-piston reciprocates, striking first onedie and then the other and jars the scale off the outer surface of thetube.

The machines are made to accurately fit the boiler-tubes in which theyare to be used, allowing-only for a slight movement of the dieholders,and the machines will not operate except in tubes of the proper size,because the die-holders will move and close the ports. In practicaluseone size has been made for four-inch tubes and another size has beenmade for six-inch tubes. The variation in boiler-tubes is very slight.

I claim 1. A boiler-tube cleaner comprising a piston-casing adapted toslide back and forth in the boiler-tubes and having a transverse boreforming a hammer-piston chamber; the ends of said chamber being enlargedto form dieholder seats a hammer piston slidingly mounted in saidchamber; said piston having valve-releasing port-connecting grooves inits periphery;v die-holders slidingly mounted in said die-holder seats,dies carried by said die-holders, a valve-casing attached to thepiston-casing and having a transverse bore parallel with thepiston-chamber and forming a valve-chamber; a valve slidingly mounted insaid valve-chamber and having pressure-port-connecting grooves in itsperiphery, and having an exhaust-port-connecting groove in its peripheryand having valveshifting ports connecting the pressure to each end ofthe valve, plugs closing the ends of said valve-chamber and asteam-supply pipe connected to said valve-casin g; there beingpressure-ports leadin g from the supply-pipe to the valve-chamber; andthere being pressureports leading from the valve-chamber to thepiston-chamber so thatthe reciprocation of the valve admits pressurefirst to one end of the valve and then to the other; and there being anexhaust-port so'that the reciprocation of the valve will release theexhaust from one end of the valve, while the pressure is being admittedto the other end, and there being valve-releasing ports leading fromsaid valve-chamber to the piston-chamber and there being secondvalve-releasing ports leading from the piston-chamber so that thereciprocation of the piston will connect said first and secondvalve-releasing ports to release the pressure first from one end of thevalve and then from the other end, as required to reciprocate the valve.

2. In a boiler-tube cleaner, a suitable frame having a transverse boreforming a hammerpiston chamber, die-holders mounted in the ends of saidchamber, a ham mer-piston mounted in said chamber, dies carried by saiddieholders, steam-ports leading to said pistonchamber, and an automaticvalve for admitting the steam first to one end of the piston and thenthe other, as required to reciprocate the hammer-piston, and cause it tostrike the dies, said dies being held outwardly against the innersurface of the boiler-tube by the steam-pressure.

. GUSTAV O. QUASEBARTH.

Witnesses:

ELLEN WELLS, ODIA M. WELLs.

